Motor bracket for sewing machines



Nov. 9 1926. I

F. DIEHL MOTOR BRACKET FOR SEWING MACHINES Filed May 25, 1923 2Sheets-Sheet l INVENTOR WITNESSES m 106%.

TTORNEY Nov. 9 1926.

F. DIEHL MOTOR BRACKET FOR SEWING MACHINES Filed May 25, 1923 2Sheets-Sheet 2 ATTORNEY WITNESSES my Alli/ w W 7M Patented Nov. 9, 1926.

FREDERICK DIEHL, OF ELIZABETH, NEW JERSEY, ASSIGNOR TO THE SINGER MANU-FACTURING CQMPANY, OF ELIZABETH, NEW/V J'EBHEY,

JERSEY.

A CORPORATION OF NEW MOTOR BRACKET FOR SEWING MACHINES.

' Application filed May as, 1923. Serial No. 640,813. 7

This invention relates to motor-brackets for sewing machine and has foran object to provide a bracket by means of which an electric motor maybe applied to various 5 types of sewing machine frames, not speciallyprovided with a motor-supporting seat.

A further object of the invention is to provide a motor-supportingbracket which .0 may be applied to sewing machines of va-.

rious types without necessitating special machining operations, such asdrilling, tapping, etc.

In the application of M. Hemleb, Serial No. 383,708, for example, thereis disclosed a motor which is adapted to be applied to a seat speciallyprovided on the vertical member of the sewing machine gboseneck.Machines have for many years commonly been 50 manufactured with thisseat which was originally designed for reception of a hand-drivingattachment.

The frames of earlier sewing machines, however, are not provided withthe hand- !5 driving attachment seat or other specially machinedportions and the mounting of a motor on the frame of such machines wouldnecessitate special machining operations, such as drilling, tapping, andthe like, which the average user does not have the ability or equipmentto perform.

The present motor-supporting bracket is of such a character that it maybe secured to a sewing machine frame at a moments notice by one notpossessed of mechanical skill or equipment, thereby adapting the machinefor reception of a driving motor.

To'the ends in view there is provided a bracket preferably having spacedarms adapted to clampingly embrace the vertical member of the sewingmachine gooseneck; the bracket being formed with a, motor-supportingseat machined and tapped to receive a motor. Preferably, the bracketcomprises an upward extension of circular outline adapting it to besubstituted for the removable cover-plate which closes the usual openingprovided at the rear side of the hollow gooseneck adjacent the bend ofthe latter, for access to the mechanism within the goose neck. Thisextension assists in supporting and locating the bracket and motor inoperative position, and may be provided with an ear for reception of thelighting device mounted on a pivot at the front side of,

the gooseneck standard. The bobbin winder may be swung forwardly aboutits pivot to carry its pulley into engagement with the belt, when it isdesired to wind a bobbin,

after which it may be pushed back to inoperat-ive position.

In the accompanying drawings, Fig. 1 is a fragmentary front elevation ofa sewing machine equipped with the present motor. attachment bracket.view of the machine. Fig. 3 is a rear end elevation of the machine andFig. 4 is a perspective view of the bracket.

The sewing machine frame comprises the usual bed l and hollow gooseneck2, the vertical member or standard 3 of which rises from the bed 1. Thesewing machine has the usual main-shaft a which carries thebalance-wheel 5 grooved at 6 forthe driving-belt. mounted at 7 on thefront side of the goose neck standard 3 the usual bobbin-winder 8 ravinga grooved driving pulley 9. The gooseneck 2 is formed at its rear sideadjacent its bend with the usual opening 10, which is closed bythe'usual cover-plate (not shown) customarily secured over the opening10 by means of the thumb-screw 11.

There are many machines in use, the beds and goosenecks of which aresmooth and have no machined portions, except as above described whichcan be utilized for supporting a motor, and the present bracket isintended to adapt such machines for the ready reception of a drivingmotor, preferably in such wise that the entire equipment may be housedwithin the usual drop-head sewing machine cabinet or portable case.

The present bracket preferably comprises the spaced outer and inner arms12, 13, respectively, which are connected by the yoke 14 having anupward extension 15 in-the form of a cover-plate of circular outline,adapted for substitution for the usual cover plate which closes theopening 10 at the bend of the sew- Fig. 2 is a top plan The machine alsohas pivotally a central 'verticalrib- 21 tapped at 22 for reception ofthe screw 23 which secures the motor 24 and its bracket 25in operativepo- .sition closely adjacent the rearward side of the standard 3. Themotor 24 and bracket 25 are preferably constructed substantially inaccordance with the disclosure of the said application of M, Hemleb,Serial No. 383,708, and the application of M. Hemleh and F. Diehl,Serial No. 498,316; the entire outfit being thereby adapted for housingwithin the cavity of the usual drop-head sewing machine cabinetorportable case without the necessity of shifting or removing the motorfrom operative position on the sewing machine frame.

The arms 12 and 13 embrace the sewing machine standard 3, preferably bya clamping engagement, and one or more thumbscrews 26, 27 which impingeupon the smooth wall of the standard 3, may be provided to facilitatesuch engagement. The arm 12 may be provided with the forward extension28 carrying the bearing screw 29 for the idler pulley 30. The motor maybe equipped with the spring pressed arm 31 carrying the belt-ten'sioningidler pulley 32.

The cover-plate 15- The bobbin-winder 8 may be swung about its pivot 7to dotted line position, Fig. 3, for bobbin-winding purposes; thedriving belt 38 running in a triangular course over the motor pulley 34,idler pulley 30jand balancewheel pulley 6.

The bracket is preferably stamped and bent up out of one piece ofsheet-metal and the arms 12 and 13, particularly the latter,

plate to embrace the vertical lmemberoi said gooseneck, the outer one ofsaid arms being formed with. a motor-supporting seat.

9,. A sewing machine motor adapter bracket comprising a cover-plateadapted to close the usual opening at the rear side of a sewing machinegooseneck, spaced arms integral with and below said cover-plate andextending transversely of the plane of the cover plate to embrace thevertical member of said gooseneck, the outer one of said arms beingformed with a motor-supporting seat, and a forward extension, and a beltpulley mounted on said extension.

In testimony whereof, I have signed my name to this specification.

FREDERICK DIEHL.

